Description :
PostGIS adds support for geographic objects to the PostgreSQL object-relationaldatabase. In effect, PostGIS \"spatially enables\" the PostgreSQL server,allowing it to be used as a backend spatial database for geographic informationsystems (GIS), much like ESRI\'s SDE or Oracle\'s Spatial extension. PostGISfollows the OpenGIS \"Simple Features Specification for SQL\" and has beencertified as compliant with the \"Types and Functions\" profile.